Thermionic valve



' May 29, 1928,

' R. L. COONEY THERMI ONI C VALVE Filed April 8, 1926 Patented May 29,1928.

30313! L. COONEY, ATLANTA, GEOBGIL TEEBIIONIC VALVE.

Application fled April 8, 1m; mm 110. 100,701.

This inventibnrelates to thermionic valves and particular] to theconstruction of the base portion 0 the same whereby the use I of socketsfor mounting the valves may be entirely obviated.

One of the objects of the invention is to minimize the number ofelectrical connections necessary for intercalatin the valve in thewiring system with which it is associated.

Another object is to construct the base in such manner as to avoidcapacity effects betweenv the terminals.

Still. another object of the invention is to provide a base with anon-microphonic portion, the same constituting the sole support for thevalve. P

Other objects of the invention will appear as the following descri tionof an illustrative embodiment thereo proceeds.

In the drawings Fig. 1 is a side elevation of a thermionic valveembodying the principles of my invention.

Fi 2 is a section of the same taken along the line 2-2 of Figure 1.

Fig. 3 is a fragmentary view showing the lower end of the base portionpartly in section.

Referring now in detail to the several figures, the numeral lrepresentsin general an 'audion tube having the usual electrodes, 1 and 2, 3 and 4desi ate the lea'ds or conductors to the electr es. The tube includes abase portion 5 formed from suitable insulating material such as aphenolic condensation roduct. Terminals 6, 7, 8 and 9 are embed ed inthe material of the base, or pass through it otherwise in any suitablemanner, said terminals being angularly diverted within the base, so asto emerge laterall therefrom as shown, and preferably in re ialdirections.

'One of the characteristics of the terminals is that they are continuousthroughout, being free from frictional contacts or other mechanicaljoints, so that the resistance within said terminals is kept low andthere are. no microphonic contacts to interfere with the per ormance ofthe tube. The

terminals are preferably provided with connectors 10 to which the apropriate leads of the wiring stem may attached, this being the on ymechanical joint necessary to be made, in contradistmction to thenumerous serially arranged mechanical and frictional contacts inherentto all forms of socket mountings.

connections being made, one'o the connectors, for instance that shown,at 13 in Fig. 1 may be made of different sha from the others so as todistinguish it t erefrom so vertent-ly be passed through the filament.

Means for mounting the valve on the base or Panel-board are' provided,consisting of a p ug 11 projecting from the lower surface of the baseportion 5 and preferably carried unitarily therewith in any suitablemanner. In Fig. 3 the plug is embedded directly into the insulatingmaterial of the base as is indicated at 12. The plug is preferablytapered and may be introduced directly into a correspondingly taperedsocket 14 formed in the mstrument-board. The plug 11 is preferably madefrom elasticmaterlal such as rubber, of non-microphonic character sothat vibrations from the instrument-board will not be communicated tothe valve. It is, however, within the spirit of the invention to formthe plug from any other suitable resilient substance.

While I have in the above description disclosed what I believe to be apreferred and .practical embodiment ofmy invention, 'itis to beunderstood that the specific details described are not limitative intheir effect upon the invention but merely illustrative except in so faras the by the terms of t e appen ed c aims.

Having described my invention what I claim as new and desire to secureby Letters Patent, is P 1. A thermionic valve including a base portion,lateral terminals carried by said use portion, and an elastic plugprojecting are 'exgressl prescribed In order'to assure the pro'r'electrical that the B-battery voltage willnot inadfrom the lower faceof said base portion m hand.

y ROBERT L.

